Total Mastery score

Good idea would be to add special gifts for people who has total mastery score higher. You receive that by playing with more champions, therefor mostly people would buy more skins cause they play with more champs. For example above 500, 600, 700 and 800 mastery score special gifts or banners or similar stuff would be I think a good idea. Cause believe me it's not easy to reach mastery score 800 :)

Cheers!